bill's footwear reatils running shoes for thirty dollars per pair. bill's footwear spends one thousand dollars a month in rent and pays teo full-time employees to each work one hundered and sixty hours a month at rste ten dollars per jours. the store shares a manager with a neighbouring company and pays 50% of the manager's annual salary of $60,000 and provides additional compensation in the form a low- cost producer and only pays them $10 each due to the manufacturing facilites residing in a low cost geography.

1. to break even each month, how many running shoes does bill's footwear need to sell?